Package org.orekit.forces.drag

Class IsotropicDrag

java.lang.Object

org.orekit.forces.drag.IsotropicDrag

All Implemented Interfaces:

DragSensitive

public class IsotropicDrag
extends Object
implements DragSensitive

This class models isotropic drag effects.

The model of this spacecraft is a simple spherical model, this means that all coefficients are constant and do not depend on the direction.

Since 14.0, this model needs to be built using IsotropicDragBuilder

Since:

7.1

Author:

Luc Maisonobe

See Also:

• IsotropicDragBuilder
• BoxAndSolarArraySpacecraft
• IsotropicRadiationCNES95Convention

Field Summary

Fields inherited from interface org.orekit.forces.drag.DragSensitive

DRAG_COEFFICIENT, GLOBAL_DRAG_FACTOR, LIFT_RATIO

Method Summary

Modifier and Type	Method	Description
<T extends CalculusFieldElement<T>> FieldVector3D<T>	dragAcceleration(FieldSpacecraftState<T> state, T density, FieldVector3D<T> relativeVelocity, T[] parameters)	Compute the acceleration due to drag.
Vector3D	dragAcceleration(SpacecraftState state, double density, Vector3D relativeVelocity, double[] parameters)	Compute the acceleration due to drag.
ParameterDriver	getActiveDriver(AbsoluteDate date)	Get the drag coefficient driver that is active at date.
List<ParameterDriver>	getDragParametersDrivers()	Get the drivers for supported parameters.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface org.orekit.forces.drag.DragSensitive

dependsOnAttitudeRate

Method Details

getDragParametersDrivers

public List<ParameterDriver> getDragParametersDrivers()

Get the drivers for supported parameters.

Specified by:

getDragParametersDrivers in interface DragSensitive

Returns:

parameters drivers

getActiveDriver

public ParameterDriver getActiveDriver(AbsoluteDate date)

Get the drag coefficient driver that is active at date.

Parameters:

date - date to check

Returns:

drag coefficient driver active at this date

Since:

14.0

dragAcceleration

public Vector3D dragAcceleration(SpacecraftState state,
 double density,
 Vector3D relativeVelocity,
 double[] parameters)

Compute the acceleration due to drag.

The computation includes all spacecraft specific characteristics like shape, area and coefficients.

Specified by:

dragAcceleration in interface DragSensitive

Parameters:

state - current state

density - atmospheric density at spacecraft position

relativeVelocity - relative velocity of atmosphere with respect to spacecraft, in the same inertial frame as spacecraft orbit (m/s)

parameters - values of the force model parameters

Returns:

spacecraft acceleration in the same inertial frame as spacecraft orbit (m/s²)

dragAcceleration

public <T extends CalculusFieldElement<T>>
FieldVector3D<T> dragAcceleration(FieldSpacecraftState<T> state,
 T density,
 FieldVector3D<T> relativeVelocity,
 T[] parameters)

Compute the acceleration due to drag.

The computation includes all spacecraft specific characteristics like shape, area and coefficients.

Specified by:

dragAcceleration in interface DragSensitive

Type Parameters:

T - instance of a CalculusFieldElement

Parameters:

state - current state

density - atmospheric density at spacecraft position

relativeVelocity - relative velocity of atmosphere with respect to spacecraft, in the same inertial frame as spacecraft orbit (m/s)

parameters - values of the force model parameters

Returns:

spacecraft acceleration in the same inertial frame as spacecraft orbit (m/s²)